2-(2,3,4,6-Tetra-O-benzyl-β-D-galactopyranosyl)thiazole | 160797-12-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-(2,3,4,6-Tetra-O-benzyl-β-D-galactopyranosyl)thiazole
• 英文别名: 2-[(2R,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]-1,3-thiazole
• CAS: 160797-12-6
• 化学式: C₃₇H₃₇NO₅S
• 分子量: 607.77
• InChiKey: QBHWFPXQVMFWJI-FGZSBDNFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.1
• 重原子数：
  44
• 可旋转键数：
  14
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  87.3
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  2-(2,3,4,6-Tetra-O-benzyl-β-D-galactopyranosyl)thiazole 在 吡啶 、 硫酸 、 sodium methylate 作用下， 以 甲醇 、 溶剂黄146 为溶剂， 生成 2,6-anhydro-3,4,5-tri-O-benzyl-7-O-tert-butyldiphenylsilyl-aldehydo-D-glycero-L-manno-heptose
  参考文献：
  名称：

  的（1→6）的合成- Ç -oligogalactosides迭代Wittig烯化

  摘要：

  碳连接的β-d-（1→6）-di-，三-和四-吡喃半乳糖苷已经通过使用半乳糖基亚甲基膦烷作为结构单元的迭代Wittig烯烃化反应合成。

  DOI：

  10.1016/s0040-4039(98)01739-0
• 作为产物：
  描述：

  2,3,4,6-四-O-苄基-D-吡喃半乳糖 在 三乙基硅烷 、 正丁基锂 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 pyridinium chlorochromate 作用下， 以 二氯甲烷 为溶剂， 反应 3.41h， 生成 2-(2,3,4,6-Tetra-O-benzyl-β-D-galactopyranosyl)thiazole
  参考文献：
  名称：

  Thiazole-Based Synthesis of Formyl C-Glycosides

  摘要：

  A method for the installation of the formyl group at the anomeric position of pyranoses and furanoses starting from the corresponding lactones has been developed. The strategy involves the addition of 2-lithiothiazole to the sugar lactone, followed by the silane reduction of the acetylated resultant ketol and the unmasking of the formyl group from the thiazole ring. All steps have been studied in some details to improve chemical efficiency and stereochemical control. Hence, reversed alpha:beta ratios of ketols were found in kinetic and thermodynamic mixtures, the former being consistent with a steric effect control of the substituents and the latter by the electronic effect of the ring oxygen. Seven sugar aldehydes with different D-pyranosidic (2,3,4,6-tetra-O-benzyl-gluco, -galacto, and -manno, 2-azido-3,4,6-tri-O-benzyl-2-deoxy-galacto) and D-furanosidic moieties (5-O-benzyl-2,3-isopropylidene-ribo; 2,3,5-tri-O-benzyl-ribo; 2,3:5,6-di-O-isopropylidene-manno) were prepared in 52-65% isolated overall yield from the corresponding lactone.

  DOI：

  10.1021/jo00100a050

文献信息

• Selectivity in the SmI2-induced deoxygenation of thiazolylketoses for formyl C-glycoside synthesis and revised structure of C-ribofuranosides
  作者：Alessandro Dondoni、Paolo Formaglio、Alberto Marra、Alessandro Massi

  DOI：10.1016/s0040-4020(01)00736-0

  日期：2001.9

  Deoxygenation of thiazolylketose acetates using SmI2–(CH2OH)2 or TMSOTf–Et3SiH affords thiazolyl C-glycosides with opposite α/β ratios. Examination of the thiazolyl α- and β-C-ribofuranoside pair by NOE experiments reveals that the earlier configuration assigned to one of these isomers has to be revised. Having prepared authentic anomeric α- and β-ribofuranose aldehydes from the corresponding thiazolyl

  使用SmI 2-（CH 2 OH）2或TMSOTf-Et 3 SiH对乙酸噻唑基酮糖乙酸进行脱氧，得到具有相反α/β比的噻唑基C-糖苷。通过NOE实验对噻唑基α-和β- C-核呋喃糖苷对的研究表明，必须修改分配给这些异构体之一的早期构型。已经制备正品异头α-和β-D-呋喃核糖醛从相应的噻唑基C ^由噻唑环的裂解-glycosides，各醛转化到（1→6） - c ^通过Wittig烯化-disaccharides与半乳糖6-正膦。
• Design and Use of an Oxazolidine Silyl Enol Ether as a New Homoalanine Carbanion Equivalent for the Synthesis of Carbon-Linked Isosteres of <i>O</i>-Glycosyl Serine and <i>N</i>-Glycosyl Asparagine
  作者：Alessandro Dondoni、Alberto Marra、Alessandro Massi

  DOI：10.1021/jo981861h

  日期：1999.2.1

  A trimethylsilyl enol ether carrying the N-Boc 2,2-dimethyloxazolidine ring was designed to serve as a synthetic equivalent of the homoalanine carbanion for the introduction of the alpha-amino acid side chain at the anomeric carbon of sugars. This new functionalized silyl enol ether was prepared in multigram scale and high enantiomeric purity starting from methyl N-Boc-L-threoninate (six steps, 49%

  设计带有N-Boc 2，2-二甲基恶唑烷环的三甲基甲硅烷基烯醇醚，作为高丙氨酸碳负离子的合成等同物，用于在糖的异头碳处引入α-氨基酸侧链。从N-Boc-L-苏氨酸甲酯开始，以克级数和高对映体纯度制备这种新的官能化甲硅烷基烯醇醚（六步，收率49％）。该试剂用于C-糖基氨基酸的两种合成方法。在一种方法中，由BF（3）.Et（2）O促进的与四-O-苄基-D-吡喃半乳糖基三氯乙酰亚胺酸酯的偶联提供了作为主要产物的α-连接的C-糖苷（分离出的收率为30％）用叔丁基锂转化为β-连接的异构体。通过Barton-McCombie方法对这些化合物进行脱氧，并通过琼斯试剂的氧化裂解从恶唑烷环上脱除糖基部分，从而得到C-糖基丝氨酸等位基因α-和β-Gal-CH（2）（）-Ser。以类似的方式从四-O-苄基-D-吡喃葡萄糖基三氯乙酰亚胺酸酯开始制备α-和β-Glc-CH（2）（）-Ser。在第二种方法中，在BF（